Weave Net for NetworkPolicy [page]deterministic

This page shows how to use Weave Net for NetworkPolicy.

##

You need to have a Kubernetes cluster. Follow the [kubeadm getting started guide](/docs/reference/setup-tools/kubeadm/) to bootstrap one.

## Install the Weave Net addon

Follow the [Integrating Kubernetes via the Addon](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#-installation) guide.

The Weave Net addon for Kubernetes comes with a [Network Policy Controller](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#network-policy) that automatically monitors Kubernetes for any NetworkPolicy annotations on all namespaces and configures `iptables` rules to allow or block traffic as directed by the policies.

## Test the installation

Verify that the weave works.

Enter the following command:

```shell kubectl get pods -n kube-system -o wide ```

The output is similar to this:

``` NAME READY STATUS RESTARTS AGE IP NODE weave-net-1t1qg 2/2 Running 0 9d 192.168.2.10 worknode3 weave-net-231d7 2/2 Running 1 7d 10.2.0.17 worknodegpu weave-net-7nmwt 2/2 Running 3 9d 192.168.2.131 masternode weave-net-pmw8w 2/2 Running 0 9d 192.168.2.216 worknode2 ```

Each Node has a weave Pod, and all Pods are `Running` and `2/2 READY`. (`2/2` means that each Pod has `weave` and `weave-npc`.)

##

Once you have installed the Weave Net addon, you can follow the [Declare Network Policy](/docs/tasks/administer-cluster/declare-network-policy/) to try out Kubernetes NetworkPolicy. If you have any question, contact us at [#weave-community on Slack or Weave User Group](https://github.com/weaveworks/weave#getting-help).